We experienced a problem with the store checkout only listing a creadit card expiry date up to 2012 or 2013 on our site at: http://www.interactivewebs.com.
We had a client contact us who was purchasing our DotNetNuke Email Module advising that they had a credit card number that went past 2013. We also noticed an old but incomplete thread on this site discussing this.
The solution we found was this:
Navigating to the "Your Cart" module. You can do this by login in as an admin (not host) and buying a product. When it takes you to the cart module...
Select Edit Skin from the module menu.
Grab the code there, and paste into notepad etc. And look to the code that looks like this.
ListItem Value="09" Selected="True">2009
Make it look like this exactly for the update at this time.
This will give you a larger future expiry date.